Hard Quiz puts four self-nominated experts under Tom Gleeson's merciless microscope. This week's topics are actor Gene Wilder, drag queen Trixie Mattel, coral and tennis champ Rafael Nadal!

What do basketballer Dennis Rodman, Mercedes Benz, the Faraway Tree book series and alkanes have in common? They're all topics on tonight's Hard Quiz, where four big fans match wits with the hilarious Tom Gleeson!